Steam-generator-controlling mechanism



June 1-7, 1930. R. JEWELL STEAM GENERATOR CONTROLLING MECHANISM Filed Nov. 25, 925

r -trolling the burner'and responsive' to temperature rises in the tube; and a tube venting .ered through the bypass just sufficient to Should for mainsclo'sed until re-opened by the operator.

In the drawing 'Fig. 1,"the water level is shown as having reached the level of the top of the elbow and'the thermal unit is shown as having been emptied through the steam- I 7 ing of the gas jet. With this conditionthe thermal element is expanded under the heat far-1d within a very short interval the gas'valve Ina steam generator controllingmech- 'a' 11is11r1, the combination of a generator chamber; arrelbow'having" an a-rmextend1ng up- 'Wardly "into the chamberanda horizontal "arm without thechamber; {a thermally sensi -tive tube-extending from the horizontal arm;

a burner under the thermal tube a'valveconthe thermal tube in the chamber extending 2; "Ina steam generator controlling mech-" .ganism, the combination of a' generator chamb'er'; an elbowhavmg an arm extend ng upfrom a point remote from the elbow toabove theupper end of the elbow. r

wardly into ,the chamber andf'a horizontal arm without the chamber a thermally sensi tive tube extending from the horizontal-arm;

v a burner underthe thermal tube; a valve 'con-. 1 :trollingthe burner and responsive to temperature rises in the tube andiartube venti'ng the -therm al tube in the chamber throughthe elbow, said vent tube" being arranged in the I" '3; In a steam generatorcontroll ng mech-' f-thermal tube and extending from a pointin --the'horizo'ntal arm remote from theelbow to 'a point in the hamber above the to f th elbow. q o p 'anism, the combination of a steam generating chamber; gas burner heating saidchamber nath'ermal'element subjected to-the liquid of the chamber'and the heat of a gas burner;

' a valve controlling the burnerand responsive'to the thermal element with'an increase" of temperature; a valve seat 'for ithe thermally controlled valve; an opposing seat; a pressure responsive valve operating on the opposing seat; and a pressure; device -respon- "-sive Etogenerator pressure controlling 'the rpres'sure responsive va l;ve. n I 4; In a steam r H generator 'c'ontrolling;mech5' ianism';-the' combinationot-a steam generating or anism, the combinationbf a generator, chamchamber; a gas-burnerheatingsaidchamber; l thermal element subjected toftlre liquid of the chamber "and the heat 'of -thejgas burner;

a valve controlling theburnerand res-pon sive to the 'tli'ermalfelement" -with' an in-f crease of temperature; a valve seat for the thermally controlled valve; an opposing seat; a pressure responsive valve operatingon the opposing seat; and a pressure device responsive to generator pressure controlling the pressure responsivevalve comprising a diaphragm, a cylindrical steni' on the pressure controlled valve secured to the diaphragm; a headed pin extending into "the stem, and a spring in the stem between the head on the pin and the diaphragm.

5. In a steamgenerator controlling mechanism the combination of a steam generating chamber ;:a gas burner heatingsaid chamber; a thermal element subjected tothe liquid of the chamber and the heatof the gas "burner;

aval ve controlling theburner and responsive to the thermalelement, with an "increaseflof temperature; a valve seat for the thermally controlledvalve;-'an"opp'osing seat; a pressure responsive valve operating on the-op- ;posing' seat; and a pressure device respon- 'siv'e to generator pressure 1 controlling the pressure responsivevalve"comprising a diaphragm, a cylindricalstem on the pressureco'ntrolled valve "secured to th'e diaphragm, a headed pin extending into the stem, a spring in the stem between the head on thepin and the diaphragm, and means for adjusting the pin.

In a: steam generator controlling mechanism, the combination of a steam' generating chamber; a gas burner heating said chamber; a thermal element subjected tothe'liquid ofthe-chamber and the'heat of a gas burner; a E;

valve controlling the burnerand responsive to a change of temperature in the'thermal element; a v'alvefsea-t for thethermally controlled valve; an opposing'seat; a pressure responsive valve operating on'the opposingseatyapressure'device responsive to generatorpressure controlling the pressure responsi'veyalve; and a bypass between theopposing seats.

7. In asteam generator controlling mechanism, the combination of a generator chamber a gas burner; a'g-as-supply passage leading to-the burner; a pressure device sensitive to chamber pressure closing and opening said passagein response-to pressure; a thermal eleme'nt exposed to :theheatiof theburner; a ,trip device released by thethermal element cutting or the gas burner upon an increase of temperature inthe'thermal element; and

a "bypass aroundjthepressure device,.the

trip device being more remote from the Iburner than the bypass whereby the bypass is closed as'thetripdevice is operated.

her; -a' gas burner a "pressure device sensitive to chamber pressure controlling i said gas burner a thermal element exposed" to the 1 58. In" a steam generator conaoiiing mechthermal element cutti n'g omme gas burn r l lespo nse to said control in theabsence of j a'liquid in the chamber; a bypassaround the -*.-iiess'ure device ;'and means for. 'aljustingthe bypass,theva1vebeing more remote from the burner than the bypasswhe'reby the bypass is closed as thevalve -is,c10sed.- j 1 In myF- haii'dw RAYMOND L; JE L; 7 

